Heater



FIG. 1 is a perspective view of a heater showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged view of portion of FIG. 2.

The evenly-spaced broken lines shown in the figures depict portions of the heater that form no part of the claimed design. The dash-dot broken lines showing the enlargements in FIGS. 2 and 9 form no part of the claimed design. 

CLAIM The ornamental design for a heater, as shown and described. 